Chapter23-S09 - http://en.wikipedia.org/wiki/Lightning

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Unformatted text preview: http://en.wikipedia.org/wiki/Lightning http://www.moonraker.com.au/techni/lightning.jpg Deadly beauty of nature Chapter 23 Electric Fields 23.1 Properties of Electric Charges Like charges repel one another Unlike charges attract one another Electric charge is conserved and quantized. Positive charge: charge on a glass rod rubbed with silk Negative charge: charge on a rubber rod rubbed with fur Law of conservation of electric charges: the net amount of electric charge produced in any 23.2 Charging Objects By Induction Electric conductors are materials such as copper, aluminum, and silver in which electric charges move freely. ex. Metals are good conductors. Electric insulators such as glass, rubber, and wood are materials in which electric charges cannot move freely. Semiconductors such as silicon, germanium, and carbon are a third class of materials, and their electrical properties are somewhere between those of insulators and those of conductors. Charging metal by induction Charging by induction: An electrically neutral insulator, just like an electrically neutral conductor, is attracted to the charged object whether the harging insulator by induction 23.3 Coulombs Law23....
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Chapter23-S09 - http://en.wikipedia.org/wiki/Lightning

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